Important Safety Information
WARNING: Please be aware of potential fire risks and strictly adhere to the instruction manual for charging and storage. For proper disposal, consult your local authority's website for more information and dispose of the lithium-ion battery safely in accordance with applicable legal requirements.
This product conforms to the relevant legislation: (EU) 2023/1542 Batteries and Waste Batteries, 2014/53/EU Radio equipment, and 2011/65/EU ROHS.
Certification: CE
1. Product Overview
The MINISO MS503 Heart Rate Monitoring Earphones are designed for sports and daily use, featuring AI translation capabilities and a comfortable ear-clip design. They offer heart rate detection, health management features, and long battery life.

2. Package Contents
- MINISO MS503 Earphones (Left and Right)
- Charging Case
- Charging Cable (Type-C)
- User Manual (this document)

3. Setup and Installation
3.1 App Download & Installation
To utilize the full features of your MINISO MS503 earphones, including heart rate monitoring and AI translation, you need to download and install the companion application.
- Search for the official app in major app stores.
- Alternatively, scan the QR code below to install the app directly.
- After your phone successfully connects to the earbuds via Bluetooth, open the app, navigate to the "Home" page, and tap "Add New Device". Once the app confirms a successful connection, you can begin using its features.

The companion software is provided free of charge for a lifetime and does not require any fees.
3.2 Wearing the Earphones
The MS503 earphones feature an ear-clip design for a secure and comfortable fit. Refer to the diagrams below for correct placement.

3.3 Bluetooth Pairing
- First-time Pairing: When the earphones are turned on and there is no previous pairing record, the left and right earphones will automatically pair with each other. After successful internal pairing, you will hear two beeps. Then, search for "MINISO MS503" in your device's Bluetooth settings and connect.
- Subsequent Connections: If the earphones have been previously paired with your device, they will automatically connect back when turned on, and the prompt will sound "beep".
4. Operating Instructions
4.1 Basic Touch Controls
The earphones feature touch-sensitive areas for controlling various functions. Refer to the diagram below for touch positions and actions.

| Function | Action |
|---|---|
| Power On/Off | Press and hold for 3-5 seconds |
| Answer/Hang Up Call | Single tap (x1) |
| Reject Call | Double tap (x2) |
| Volume Up/Down | Double tap (x2) on respective earbud (L for down, R for up) |
| Next Track | Triple tap (x3) on right earbud |
| Previous Track | Triple tap (x3) on left earbud |
4.2 Indicator Light Description
- Headset On: White light flashes.
- Headset Off: Red light stays on for 2 seconds, then turns off.
- Pairing Status: White light flashes.
- Connection Successful: No light.
4.3 Heart Rate Monitoring
The earphones are equipped with a heart rate monitoring function. You can view real-time heart rate data and track your heart rate fluctuations through the companion app. This feature helps you optimize your exercise results by staying informed about your heart rate during workouts.


4.4 AI Translation Features
The MINISO MS503 earphones offer multi-scenario AI translation, supporting over 135 languages across various modes to facilitate communication without limits.
- AI Dialogue Mode: For real-time conversational translation.
- Translation Machine Mode: Translate spoken words directly.
- Free Talk Mode: Engage in natural conversations with translation.
- Headphones + Phone Mode: One person speaks into the earphones, the other into the phone for translation.
- Dual Ear Click Mode: Each person wears an earphone and clicks to initiate translation.
- Voice Note Mode: Translate spoken notes.
- Photo Translation: Translate text from images.


5. Maintenance
5.1 Charging the Earphones and Case
- Earphone Charging: Place the earphones into the charging case. A red light will stay on during charging. Once fully charged, the red light will turn off.
- Charging Case Charging: Connect the Type-C charging cable to the charging case and a power source. The charging case's display screen will show the battery level. When fully charged, the screen will indicate 100%. The display will automatically turn off after approximately 30 seconds of inactivity; slide to re-enter the display screen.
- Charging Time: Approximately 1.5 hours for a full charge of the case.
5.2 Waterproof and Dustproof
The earphones are rated IPX5 waterproof and dustproof. This means they are resistant to daily splashes of water, sweat during exercise, and light rain. The waterproof level of the headphone battery compartment is also designed to handle various accidents.

6. Troubleshooting
6.1 Clear Bluetooth Pairing History
If you experience issues with pairing or connection, you may need to clear the Bluetooth pairing history. To do this, ensure both earphones are connected, then tap the touch-sensitive area on both the left and right earphones 5 times simultaneously.
6.2 Reset Earphones
If the earphones fail to pair with each other or reconnect to your device, you can reset them. Tap both earphones five times simultaneously. Note that resetting the earphones will clear their Bluetooth pairing history.
7. Specifications
| Feature | Specification |
|---|---|
| Product Name | Heart Rate Monitoring Earphones |
| Model | MS503 |
| Brand | MINISO |
| Color Options | Black, Ivory White, Rose Gold |
| Material | Plastic, Silica Gel, ABS+PC |
| Battery Capacity (Case) | 300mAh |
| Battery Capacity (Earphone) | 40mAh (single earphone) |
| Music Time | Around 4.5 Hours (single charge) |
| Talk Time | Around 4 Hours (single charge) |
| Total Battery Life (with case) | Up to 48 Hours |
| Charging Time (Case) | 1.5 Hours (Type-C fast charge) |
| Bluetooth Version | Bluetooth 6.0 / V6.0 |
| Bluetooth Connection Distance | 10m |
| Adaptability | Bluetooth enabled playback device |
| Waterproof Rating | IPX5 |
| Sound Isolating | No |
| Category | Earphones & Headphones |
| Earcups Type | Open-back |
| Max Output | 10mW |
| Number Of Drivers | 2 |
| Headphone Pads Material | Silicone |
| Driver Diameter | 14.2mm |
| Total Harmonic Distortion | 1% |
| Impedance Range | up to 32 Ω |
| Codecs | AAC, sbc |
| With Microphone | Yes |
| Wireless | Yes |
| Line Length | 0m |
| Frequency Response Range | 20 - 20000Hz |
| Sensitivity | 28dB |
| Active Noise-Cancellation | No |
| Volume Control | Yes |
| Vocalism Principle | Dynamic |
| Connectors | Type C |
| Style | Ows ear clip headphones |
| Origin | Mainland China |
| Resistance | 16 Ω |
| Support Memory Card | No |

8. User Tips
- Value for Money: Users generally find the earphones offer good value for their price point.
- Health Monitoring Accuracy: While equipped with heart rate monitoring, note that the accuracy for heart rate tracking may be sporadic, and oxygen measurement can be inaccurate. These features should not be relied upon for medical purposes.
- AI Translation: The AI translation feature is functional but may require further improvements for optimal performance.
- Battery Life: The single-charge battery life for the earbuds is around 4-4.5 hours. For extended use, ensure you carry the charging case, which provides up to 48 hours of total listening time.
- Wearing Comfort with Glasses: Some users find the ear-clip design to be adequately comfortable even when wearing glasses.
9. Warranty and Support
For detailed warranty information and support, please refer to the official user manual PDF available online. The companion software for the earphones is free to use for a lifetime and does not incur any charges.